{
  "manageEntity": {
    "action": "Save",
    "entityId": "1199918737",
    "entityType": "Track",
    "nonce": "0x30b9e34f6c805b6910b270ab791e9378a2378c72d11917afbfb4d086913ccc6e",
    "signature": "0x3499c8b827e5835e9c204ca8f62fcd7f8452fdf1630f906b39c008da763c5eb35625ca667528c3b04bd6cd74f0068a9f46b6c6c51607d1cc342c0205916cd6d41c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}